Use after free in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote… (CVE-2026-73637)
A use-after-free vulnerability exists in the mod_auth_digest module of Apache HTTP Server versions before 2.4.69. This flaw allows an unauthenticated remote attacker to cause authentication state corruption by sending concurrent Digest authentication requests when specific configuration options are enabled. The issue is resolved in Apache HTTP Server version 2.4.69.
AI Analysis
Technical Summary
CVE-2026-73637 is a use-after-free vulnerability in the mod_auth_digest module of Apache HTTP Server on all platforms prior to version 2.4.69. The vulnerability arises when the AuthDigestNcCheck directive is enabled or AuthDigestNonceLifetime is set to 0, allowing unauthenticated remote clients to cause corruption of authentication state via concurrent Digest authentication requests. This can lead to undefined behavior or potential security issues related to authentication.
Potential Impact
An unauthenticated remote attacker can trigger authentication state corruption, potentially disrupting authentication processes. The exact impact beyond state corruption is not detailed in the provided data. No known exploits in the wild have been reported.
Mitigation Recommendations
Users are advised to upgrade to Apache HTTP Server version 2.4.69, which contains the official fix for this vulnerability. No other mitigation steps are indicated.
Use after free in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote… (CVE-2026-73637)
Description
A use-after-free vulnerability exists in the mod_auth_digest module of Apache HTTP Server versions before 2.4.69. This flaw allows an unauthenticated remote attacker to cause authentication state corruption by sending concurrent Digest authentication requests when specific configuration options are enabled. The issue is resolved in Apache HTTP Server version 2.4.69.
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-73637 is a use-after-free vulnerability in the mod_auth_digest module of Apache HTTP Server on all platforms prior to version 2.4.69. The vulnerability arises when the AuthDigestNcCheck directive is enabled or AuthDigestNonceLifetime is set to 0, allowing unauthenticated remote clients to cause corruption of authentication state via concurrent Digest authentication requests. This can lead to undefined behavior or potential security issues related to authentication.
Potential Impact
An unauthenticated remote attacker can trigger authentication state corruption, potentially disrupting authentication processes. The exact impact beyond state corruption is not detailed in the provided data. No known exploits in the wild have been reported.
Mitigation Recommendations
Users are advised to upgrade to Apache HTTP Server version 2.4.69, which contains the official fix for this vulnerability. No other mitigation steps are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-gr5c-77fq-wx32
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-73637"]
- State
- PUBLISHED
Threat ID: 6abeb3e3a43b0b3b89ecebc4
Added to database: 10/01/2026, 19:26:27 UTC
Last enriched: 10/01/2026, 19:28:11 UTC
Last updated: 10/02/2026, 03:45:55 UTC
Views: 5
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